This report describes the typical weather at the Amsterdam Airport Schiphol (Amsterdam, The Netherlands) weather station over the course of an average July. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Amsterdam has a mild humid temperate climate with warm summers and no dry season. The area within 25 mi of this station is covered by croplands (62%), oceans and seas (27%), and built-up areas (8%).
The month of July is characterized by gradually rising daily high temperatures, with daily highs around 70°F throughout the month, exceeding 81°F or dropping below 61°F only one day in ten.
Over the course of July, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 1:09 hours, implying an average day-over-day decrease of 2.2 minutes.
The shortest day of the month is July 31 with 15:32 hours of daylight; the longest day is July 1 with 16:41 hours of daylight.
The earliest sunrise is at 5:24am on July 1; the latest sunset is at 10:06pm on July 2; the latest sunrise is at 6:01am on July 31; the earliest sunset is at 9:33pm on July 31.
Daylight savings time is observed in 2012 but it neither starts nor ends in July, so the entire month is in daylight time.
The median cloud cover ranges from 57% (partly cloudy) to 63% (partly cloudy). The trend is for the sky to be clearing with the median cloud cover decreasing by 6% from the start to the end of the month.
On July 16, a representative day, the sky is clear or mostly clear 40% of the time, partly cloudy 19% of the time, and mostly cloudy or overcast 36% of the time.
The average probability that some form of precipitation will be observed in a given day is 60%, with little variation over the course of the month.
Throughout July, the most common forms of precipitation are moderate rain, thunderstorms, and light rain.
Moderate rain is the most severe precipitation observed during 63% of those days with precipitation. It is most likely around July 14, when it is observed during 38% of all days.
Thunderstorms are the most severe precipitation observed during 19% of those days with precipitation. They are most likely around July 31, when it is observed during 12% of all days.
Light rain is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around July 26, when it is observed during 8% of all days.
Either snow is exceptionally unlikely to fall at this location in July or this station does not reliably report precipitation types.
The relative humidity typically ranges from 60% (mildly humid) to 95% (very humid) over the course of a typical July, rarely dropping below 45% (comfortable) and reaching as high as 100% (very humid).
The air is driest around July 1, at which time the relative humidity drops below 68% (mildly humid) three days out of four; it is most humid around July 18, rising above 94% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical July, the dew point typically varies from 50°F (very comfortable) to 61°F (comfortable) and is rarely below 45°F (dry) or above 66°F (muggy).
The time of the month between July 1 and July 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of July typical wind speeds vary from 3 mph to 16 mph (light air to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around July 2, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around July 30, at which time the average daily maximum wind speed is 15 mph (moderate breeze).